<template>
  <view v-if="goodsDetail.pics.length > 0">
    <!-- 商品图片轮播图 -->
    <swiper :indicator-dots="true" :autoplay="true" :interval="3000" :duration="1000" :circular="true">
      <swiper-item v-for="(item, i) in goodsDetail.pics" :key="i">
        <image :src="item.pics_big" @click="handlePreview(i)"></image>
      </swiper-item>
    </swiper>

    <!-- 商品信息 -->
    <view class="goods-info-box">
      <!-- 商品价格 -->
      <view class="price">￥{{goodsDetail.goods_price}}</view>
      <!-- 信息主体区域 -->
      <view class="goods-info-body">
        <!-- 商品名称 -->
        <view class="goods-name">{{goodsDetail.goods_name}}</view>
        <!-- 收藏 -->
        <view class="favi">
          <uni-icons type="star" size="18" color="gray"></uni-icons>
          <text>收藏</text>
        </view>
      </view>
      <!-- 运费 -->
      <view class="yf">快递：免运费</view>
    </view>

    <!-- 商品详细介绍 -->
    <rich-text :nodes="goodsDetail.goods_introduce"></rich-text>

    <button open-type="contact" class="kf_box"></button>
    <!-- 商品导航 -->
    <view class="goods-nav">
      <uni-goods-nav :fill="true" :options="options" :buttonGroup="buttonGroup" @click="leftClick"
        @buttonClick="rightClick" />
    </view>

  </view>
</template>

<script>
  import {
    mapMutations,
    mapGetters
  } from 'vuex'
  export default {
    data() {
      return {
        goodsDetail: {},
        // 左侧按钮组的配置对象
        options: [{
          icon: 'headphones',
          text: '客服'
        }, {
          icon: 'cart',
          text: '购物车',
          info: 0
        }],
        // 右侧按钮组的配置对象
        buttonGroup: [{
          text: '加入购物车',
          backgroundColor: '#ff0000',
          color: '#fff'
        }, {
          text: '立即购买',
          backgroundColor: '#ffa200',
          color: '#fff'
        }]
      };
    },
    computed: {
      // #2 去取 total
      ...mapGetters('m_cart', ['total'])
    },
    watch: {
      // #3 监听 total 的变化处理徽标
      total: {
        handler(newTotal) {
          this.options[1].info = newTotal
        },
        immediate: true
      }
    },
    onLoad(options) {
      this.getGoodsDetail(options.goods_id)
    },
    methods: {
      // #2 取出 mutations
      ...mapMutations('m_cart', ['addToCart']),
      // 定义请求商品详情数据的方法
      async getGoodsDetail(goods_id) {
        const {
          data: res
        } = await uni.$http.get('/goods/detail', {
          goods_id
        })
        if (res.meta.status !== 200) return uni.$showMsg()
        // 为 data 中的数据赋值
        // 解决图片的上下缝隙问题
        res.message.goods_introduce = res.message.goods_introduce.replace(/<img /g, '<img style="display:block;" ')
          .replace(/webp/g, 'jpg')
        this.goodsDetail = res.message
      },
      handlePreview(i) {
        uni.previewImage({
          // 从哪儿开始预览
          current: i,
          // 图片数据，[a.jpg, b.jpg]
          urls: this.goodsDetail.pics.map(item => item.pics_big),
        })
      },
      leftClick(e) {
        if (e.index === 1) {
          // console.log('点击的是购物车')
          uni.switchTab({
            url: '/pages/cart/cart'
          })
        }
      },
      rightClick(e) {
        if (e.index === 0) {
          // #3 点击加入购物车按钮，添加到 vuex
          const goods = {
            goods_id: this.goodsDetail.goods_id, // 商品的Id
            goods_name: this.goodsDetail.goods_name, // 商品的名称
            goods_price: this.goodsDetail.goods_price, // 商品的价格
            goods_count: 1, // 商品的数量
            goods_small_logo: this.goodsDetail.goods_small_logo, // 商品的图片
            goods_state: true // 商品的勾选状态
          }
          this.addToCart(goods);
          uni.showToast({
            title: '加入购物车成功',
            icon: 'success'
          })
        }
      }
    }
  }
</script>

<style lang="scss">
  swiper {
    height: 750rpx;

    image {
      width: 100%;
      height: 100%;
    }
  }

  // 商品信息区域的样式
  .goods-info-box {
    padding: 10px;
    padding-right: 0;

    .price {
      color: #c00000;
      font-size: 18px;
      margin: 10px 0;
    }

    .goods-info-body {
      display: flex;
      justify-content: space-between;

      .goods-name {
        font-size: 13px;
        padding-right: 10px;
      }

      // 收藏区域
      .favi {
        width: 120px;
        font-size: 12px;
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        border-left: 1px solid #efefef;
        color: gray;
      }
    }

    // 运费
    .yf {
      margin: 10px 0;
      font-size: 12px;
      color: gray;
    }
  }

  .goods-nav {
    position: sticky;
    bottom: 0;
    z-index: 99;
  }

  .kf_box {
    width: 100rpx;
    height: 100rpx;
    background-color: pink;
    position: fixed;
    bottom: 0;
    left: 0;
    z-index: 9999;
    opacity: 0;
  }
</style>
